SCM CUBO2 AQUA Manual 

Version UMT/WG T-MT OEM rev. 3.0 date 08/10/2021 OEM-Handbuch (DE) Version UMT/WG T-MT OEM Rev. 3.0 Datum 08/10/2021 Manuel OEM (FR) Version UMT/WG T-MT OEM rév. 3.0 date 08/10/2021 Manufactured by SCM REF AB - Sweden ...

UMT/WG T MT Rev3.0 – 08/10/2021 Pag. 1-EN OEM Manual (EN) Version UMT/WG T-MT OEM rev. 3.0 date 08/10/2021 Manufactured by SCM REF AB - Sweden ...

Pag. 2-EN UMT/WG T MT Rev3.0 – 08/10/2021 Manual Guide POINT 1-2 > INTRODUCTION & SAFETY POINT 3-6 > UNIT DESCRIPTION POINT 7 > COMMISSIONING POINT 8 > SOFTWARE – USER INTERFACE POINT 9 > SERIAL COMMUNICATIONS POINT 10 > MAINTENANCE POINT 11-13> ALARMS AND TROUBLES POINT 14-21> TECHNICAL DATA ...

UMT/WG T MT Rev3.0 – 08/10/2021 Pag. 3-EN Contents 1 Introduction ....................................................................................................................................................................... 4 2 Safety issues with CO2 - Safe handling ........................................................................................................................... 4 2.1 Precaution ........... ...

Pag. 4-EN UMT/WG T MT Rev3.0 – 08/10/2021 1 Introduction CUBO2 AQUA is an high efficiency condensing unit (for CO2 transcritical application) equipped with BLDC variable speed compressor. It is compact, easy to install and can directly communicate with the refrigerated units. Thanks to these features it is a very efficient (even at partial load) without any compromise with the food conservation. This manual refers to CUBO2 AQ ...

UMT/WG T MT Rev3.0 – 08/10/2021 Pag. 5-EN  Piping, equipment components and tools should be appropriate for use with R744 (CO2 refrigerant).  Use of unsuitable components or those designed for HFC refrigerant may cause serious incidents such as equipment failure and rupture of the refrigerant cycle.  Securely place the cover on the electrical box and enclosure panel. Incomplete attachment may lead to penetration of w ...

Pag. 6-EN UMT/WG T MT Rev3.0 – 08/10/2021 3 Unit description & Main components Medium temperature condensing unit is equipped with a BLDC compressors a Flash valve and an HPV valve. The compressor is taking in charge the evaporation pressure control for the medium temperature refrigerated devices. The Flash valve is controlling the pressure inside the receiver. The HPV valve is controlling the Gas Cooler pressure. The system ...

UMT/WG T MT Rev3.0 – 08/10/2021 Pag. 7-EN 4 Unit installation  The unit has been designed for outdoor installation.  Respect distances for correct operation/ maintenance.  In the case of several units in series or in parallel mode, respect the minimum distances for properly maintenance. Minimum maintenance distances. Vertical installation Horizontal installation ...

Pag. 8-EN UMT/WG T MT Rev3.0 – 08/10/2021 5 Piping details 5.1 Pipe Connections (Multi-Split) The connection between the Condensing Unit and more remote evaporators can be the same one used for Multi-Split or branch system. The preferred one is the one is able to guarantee the highest gas velocity in the suction line (for a good oil return) with a low pressure drop. For Multi-Split layout, the system requires a dedicated suct ...

UMT/WG T MT Rev3.0 – 08/10/2021 Pag. 9-EN 6 Test and inspection before start-up 6.1 Control of the unit tightness All units are pressure tested and checked for leaks. Each unit is delivered with a nitrogen charge pressure of 2 bar. It is recommended before proceeding with the installation, to check the pressure of the refrigeration system of the unit using a suitable manifold gauge in order to detect possible leaks. 6.2 Preli ...

Pag. 10-EN UMT/WG T MT Rev3.0 – 08/10/2021 6.4 Inspection of the water loop The cooling of the discharge gas coming from the compressor is occurring inside the PHE Gas Cooler. The PHE installed in the CUBO2 AQUA is a Gas-Water heat exchanger and the water flow is controlled by a 3Way Modulating Valve according to the Gas Cooler outlet temperature. Before switching on the condensing unit, it is important to be sure that the wa ...

UMT/WG T MT Rev3.0 – 08/10/2021 Pag. 11-EN 7 Commissioning The unit leaves the factory without being filled with refrigerant. The compressor and receiver are pre-charged with oil. The customer is responsible for charging the system with CO2 and adding more oil (only if strictly necessary). The instruction given herein are a reminder of the best method to protect the unit, which could be seriously damaged in the event it is no ...

Pag. 12-EN UMT/WG T MT Rev3.0 – 08/10/2021 7.2 Refrigerant & Oil Charging 7.2.1 Oil charge  All CUBO2 AQUA are equipped by SCM with an additional pre-charged of 250ml of Oil (type PAG VG100) in the receiver. This info is highlighted with a label applied in the switch panel door.  Take care to avoid moisture ingress. PAG oil is extremely hygrosopic! Oil type approved is DAPHNE PZ100S or RENISO PAG100. 7.2.2 Procedure for ...

UMT/WG T MT Rev3.0 – 08/10/2021 Pag. 13-EN 7.2.3 Estimation of the refrigerant charge To calculate the refrigerant quantity to charge in the system you should know:  Volume of evaporator coil  Diameter and Length of the piping  Liquid Receiver volume and Gas Cooler volume The total charge of refrigerant will be the obtained summing up the single quantity needed for the evaporators, for fill the liquid line and consid ...

Pag. 14-EN UMT/WG T MT Rev3.0 – 08/10/2021 Pipe length (m) Liquid line 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 K65 - 120bar 3/8’’(gr) 230 270 320 360 410 460 500 550 590 640 680 730 770 820 860 910 K65 – 120bar 1/2’ (gr) 410 490 570 650 730 810 900 980 1060 1140 1220 1300 1380 1470 1550 1630 K65 – 80 bar 1/2’ (gr) 450 530 620 710 800 890 980 1070 1160 1250 1340 1420 1510 1600 1690 1780 Examples of refrigerant c ...

UMT/WG T MT Rev3.0 – 08/10/2021 Pag. 15-EN 7.2.4 Charging procedure  For charging, use port 1/4SAE (7/16”- 20UNF) on service valve (PS120bar - CASTEL 6110E/X15) Important remarks about the CO2 charging procedure:  CO2 of purity class of N4.0 or comparable or with moisture content <10 ppm must be used.  Charge R744 vapour into the system to a pressure of 10 bar g then liquid charge into the liquid line service por ...

Pag. 16-EN UMT/WG T MT Rev3.0 – 08/10/2021 8 User Interface and main Software features 8.1 User Interface Manufacturer PW: 1234 Button meaning Display meaning 1 Shows active alarms list and accesses to the alarm log. If pressed for more than 5 sec., resets all acknowledged alarms. A Active alarm preset and manual operation. 2 Used to enter main mask tree. B Unit status. 3 Return to back mask or higer level. C Rotation speed o ...

UMT/WG T MT Rev3.0 – 08/10/2021 Pag. 17-EN 8.2 On/Off unit Even if the unit is powered, it will stay in stand-by (regulation OFF) until the user turns-on the regulation (regulation ON). The main steps to switch ON the regulation are reported here below: From main menu, press “Enter” button and appear access with password (see A mask). Note. Current mask / total masks. The horizontal rows mean access level Letters and ...

Pag. 18-EN UMT/WG T MT Rev3.0 – 08/10/2021 8.3 Regulation set point Select “Compressor” and press “Enter” Select “Regulation” and press “Enter If there are no serial communication between the CDU and the remote evaporators, compressor will be managed with a fixed setpoint. Suction set point request. P+I regulation mode. In case of remote evaporators enabled, regulation type switch automatically from fixed point ...